Improvement in printing-presses



presented to' it. g is afrietion-roller to receive the downwardl FFICE.

PATENT ALONZO GILMAN, on 'ruoiznnw YORK.

sMPROVvEME-NT IN PRINTING-PRESSE'.

Specification forming part of Letters Patent No.- 3,716, dated August23, lE4-L T0 all whom it may concern:

Be it known that I, ALONZO GILMAN, of the city of Troy, in the county ofRenssalaer and State of New York, have invented newaud usefulImprovements in Printing-Presses;- and I do hereby declare that thefollowing is a full and exact description, reference being had Ito theannexed drawings, making part ot' this specification, in which drawings-Figure l is a .perspective side view of a u printing-press.

At c a is a pair of togglesor bracing-levers i employed to produce theimpression required in printing. Y

b is thebed-plate to the chase c and the type when set and attached forprinting.

At (Z the levers are united' by a socket-joint.

c .is a friction-roller for the bearing .of the levers upon the cam f,by which they are operated.

y is a vertical plate, serving as lthe platen for giving the impression,and its inner surface is adjusted -to face of the type by means of thescrews shown in connection as passing th rough the fixed plate h. v

At I, Fig. 1, is acylinder for receiving, and at z a roller forequalizing upon its surface, the ink to be communicated to theinkingrollers. So far these are in common use; but the manner in whichthe hiking-rollers j j are suspended in the frame to which theyibelongand are operated and applied to the purposes intended being consideredas new, I will here add more specifically that'k Figs. 1 and 2, arelever-arms extending from the shaft L to short sweeps connected with thelower crossvbar B of the woi'ki11g-i'ran1e M of these ink- Eng-rollers.

N is, in effect, the opposite arm of t-he same levers of which the shaftL serves. as the fulcrum. This .inner arm, X, as shown in the drawings,is so formed and supplied with appendages as to beconie connected withthe cam f by means of` a flange overlapping the inner surface of its rimfrom each side in such manner as to slide easily upon it as the canirevolves,

and, by means of the pin-joint at p, conform to the various inclinationsof surface thereby bearing of the cam upon this end of the lever. Bythese provisions it will be seen that the working-frame M, with theinking-rollers, receives its up-and-down motion at every revolution ofthe cam, causing the rollers' to pass over the face of the type as they,by the-ac` tion of the same cam in operating thc-levers a a, arewithdrawn from, the platen.

In order to conform the surface of the inking-rollers to thatV of thecylinder I in receiving from it their required supply of ink, and alsoto the face of the type in imparting the same to them, I provide twohalf-circular appendages to the working-frame, one of which is shown at1', Fig. 2, into which the respective journals of the rollers areplaced. They are attached to the sidesof the frame on the inside by acentral pi nj oint, so as to adapt the line of surface of each to thecurve of the cylinder and to the face of the type as they pass incontact with them; and, asa further provision for adjusting theirrespective surfaces to each other, a transverse tongue and groove ismade between each appendage or block and the side ofthe working-frame,the same, where it is attached, being extended in width for thatpurpose, with an adjusting-screw, by means of which the rollers aremoved out or in` at discretion, and ixed in their position whenadjusted, excepting the lateral circular inotion, as above provided for,upon the pinjoint, which adapts the line of surface of each to the curveof the cylinder and face ot' the type as they are respectively brought.incontact therewith.

S S are the ways vbetween which the working-frame passes in its11p-a-nd-do\vn motion.

For the purpose of applying the machine to theprinting` ot'paper insheets as distinguished from cards, I provide a frisket, as representedat a, Fig. 2, attached by hinge-joints to the top of theworking-trameprovided for that purpose, and there shown in con nection. This framepasses up and down between the ways b b, and receives its motiontlm-)ugh the instrumentality of the cam c and the lever (l, connectedwith each other in thesaine manner as that above described forol'icrating' the inkin rollers. This lever is 4made looseupon the ShaftL, so as not to turn with it, and the forni of the cam with which it isConnected, as show n in the drawings, is such that in its revolution thefrisket is kept elm-'ated loir;r enough to allow a sheet to be taken ontand another put closing the friske'tv in this operation.

2 v :wie

' in before it is again drawn 'down between the type and the platen forimpressment.

Friction-rollers are provided at each side rizn to vgive ease to itsmotion, as Well asfor Springs also are provided on the outside of one ofits Wings, as shown at e e, to keep them suf-4 eiently dosed in passing,and a spring on' the inside, at, f, to separate them when brought againto the top of the machine.

1Whitt I claim, and desire te secure by Letters Patent, is'

l. The hanging of the inleing-rollers, 'in the nin-nner above deseribed,in the working-frame provided for them, by means of which they `are madeconformable, in passing, to the curve y ALONZO GILMAN. Witnesses:

S. S. HUNT, DANIEL XVHITING.

